[hatari-devel] Higher precision when generating samples -> use nanosleep

[David Savinkoff]

Hi All,

This new patch supersedes my previous patches.

This patch addresses:
- Required boundary checking in vbl/sample-rate rounding.
  (prevents excessive samples from over running the buffer)
- abs(nFrameDelay) > 4*nFrameDuration in Main_WaitOnVbl().
  (prevents 16.384 second timer rollover wait when out of sync)
- Using the least common multiple (LCM) of 71 60 and 50 Hz.
- Continuous clock cycle correcting in Main_WaitOnVbl().
  (prevents excessive samples from accumulating)
And timing will not misbehave in 47 days or 2038 or ever.

David
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